首页|Alkaline earth – rare earth sintering additives for SiC: Reactivity and effectiveness

Alkaline earth – rare earth sintering additives for SiC: Reactivity and effectiveness

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© 2022 Elsevier B.V.Alkaline earth (AE) nitrates were examined as silicon carbide (SiC) sintering additives for nuclear applications because AE elements are safer than conventional Al-based additives under neutron irradiation. The AE nitrates transformed to oxides during sintering without decomposing SiC, as predicted by thermodynamic simulations. Although a eutectic liquid was formed by the reaction between AE oxides and SiO2, pure AE systems were ineffective, exhibiting the highest density of 77 %. On the other hand, a novel AE-rare earth (RE) system increased the density of SiC to ≥ 95 %, and thus could replace the Al-based additives.

Alkaline earth elementHot-pressingsilicon carbide (SiC)Sintering additive

Colkesen P.、Kaplan G.、Yoon D.-H.

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School of Materials Science and Engineering Yeungnam University

2023

10.1016/j.matlet.2022.133384

Materials letters

Materials letters

SCI
ISSN：0167-577X
年,卷(期)：2023.330(Jan.1)
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